ISO INTERNATIONAL STANDARD 14520-17 First edition 2022-02 Gaseous fire-extinguishing systems Physical properties and system design - Part 17: Halocarbon Blend 55 Systemes d'extinction d'incendie utilisant des agents gazeux - Proprietesphysiquesetconception dessystemes Partie 17: Melange d'hydrocarbures halogénés 55 Reference number IS0 14520-17:2022(E) Tso IS0 2022 IS0 14520-17:2022(E) COPYRIGHTPROTECTEDDOCUMENT IS02022 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or IsO's member body in the country of the requester IsO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier,Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland ii IS02022-Allrightsreserved IS0 14520-17:2022(E) Contents Page Foreword iv Introduction. .V 1 Scope. 1 2 Normative references 1 3 Termsanddefinitions 1 4 Characteristics and uses. 1 4.1 General. 1 4.2 Use of Halocarbon Blend 55 2 5 Safety of personnel 4 System design. 6 5 Fill density 6.1 5 6.2 Superpressurization. 5 6.3 Extinguishant quantity 5 6.4 Otherfill density and superpressurization levels 8 7 Environmental properties. 9 @IS0 2022-All rights reserved iii